NMAP
> nmap -p <start_port>-<endport> <ip>
Example:
> nmap -p 30000-32000 127.0.0.1 Starting Nmap 7.01 ( https://nmap.org ) at 2019-04-23 21:10 UTC Nmap scan report for localhost (127.0.0.1) Host is up (0.00017s latency). Not shown: 2000 closed ports PORT STATE SERVICE 30500/tcp filtered unknown Nmap done: 1 IP address (1 host up) scanned in 1.24 seconds > nmap -p 30000-32000 10.250.220.238 Starting Nmap 7.01 ( https://nmap.org ) at 2019-04-23 21:11 UTC Nmap scan report for kubernetes-devtest-worker1 (10.250.220.238) Host is up (0.00017s latency). Not shown: 2000 closed ports PORT STATE SERVICE 30500/tcp open unknown Nmap done: 1 IP address (1 host up) scanned in 0.08 seconds